I think I know what you are getting at... if enabling all stats programs, they run 3 times... well, the answer is yes, they are separate scripts and will parse the logs separately. If you want to avoid this, you can offer, say only one stats program for your users on that box. We do this with some of our boxes that have urchin for instance. Most users won't need or want anything else, and if they do, we allow them to access the raw logs, and crunch them as they see fit.